Dyfyniad APA

Levitt, S. D. (2009). Super Freakonomics: [global cooling, patriotic prostitutes and why suicide bombers should buy life insurance]. Harper.

Dyfyniad Arddull Chicago

Levitt, Steven D. Super Freakonomics: [global Cooling, Patriotic Prostitutes and Why Suicide Bombers Should Buy Life Insurance]. USA: Harper, 2009.

Dyfyniad MLA

Levitt, Steven D. Super Freakonomics: [global Cooling, Patriotic Prostitutes and Why Suicide Bombers Should Buy Life Insurance]. Harper, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.